CN111618776B

CN111618776B - Switching spanner

Info

Publication number: CN111618776B
Application number: CN202010499414.9A
Authority: CN
Inventors: 王辉; 徐翔宇; 吴动波; 张凱尧; 耿皓琪
Original assignee: Tsinghua University
Current assignee: Tsinghua University; AECC Shenyang Engine Research Institute
Priority date: 2020-06-04
Filing date: 2020-06-04
Publication date: 2021-08-20
Anticipated expiration: 2040-06-04
Also published as: CN111618776A

Abstract

The invention provides a transfer wrench, and belongs to the technical field of aircraft engine assembly. The provided adapter wrench includes: the support plate is used for being connected with an aero-engine air compression drum disc, the spline sleeve is arranged on the support plate, the plate body is connected with the spline sleeve and the tightening arm respectively, the tightening arm is provided with a to-be-assembled nut, and the plate body is used for driving the tightening arm to rotate so that the to-be-assembled bolt on the aero-engine air compression drum disc is in close fit with the to-be-assembled nut. The switching wrench provided by the invention solves the problem that a hand cannot reach an assembly position when a common wrench is used for construction, and enables bolts among air drum discs of the whole engine to be easily assembled and disassembled.

Description

Switching spanner

Technical Field

The invention relates to the technical field of aircraft engine assembly, in particular to a transfer wrench.

Background

The aero-engine rotor assembly needs to be provided with bolts among pressure drum discs, the pressure drum discs are one of important parts in the aero-engine rotor assembly, and the connection of the pressure drum discs has strict requirements on the tightening torque of the bolts and nuts. Because the pressure air drum cylinder disc is narrow in position, when a common wrench is used for construction, a hand cannot reach an assembly position, the operation space is narrow and invisible, and the situation that a nut falls into the pressure air drum cylinder disc and is difficult to take out easily occurs.

Therefore, the existing spanner for the aircraft engine has the technical problem that the nut to be assembled is not easy to install.

Disclosure of Invention

In view of the above, the present invention provides an adapter wrench to solve the problems in the prior art.

The invention provides an adapter wrench which comprises a plate body, a spline sleeve, a support plate and a tightening arm, wherein the support plate is used for being connected with an aero-engine air drum pressing disc, the spline sleeve is arranged on the support plate, the plate body is respectively connected with the spline sleeve and the tightening arm, a nut to be assembled is arranged on the tightening arm, and the plate body is used for driving the tightening arm to rotate so that a bolt to be assembled on the aero-engine air drum pressing disc is tightly matched with the nut to be assembled.

According to a concrete implementation mode of this disclosure, the plate body includes integral key shaft and spanner, the integral key shaft respectively with the spanner and the spline housing is connected, the spanner is used for driving the integral key shaft rotates.

According to a concrete implementation mode of this disclosure, the integral key shaft includes the interior axle of spline and the outer axle of spline, the interior axle of spline with the outer axle of spline passes through splined connection, the interior axle of spline with the spanner is connected, the outer axle of spline with the spline housing is connected.

According to a concrete mode of realization of this disclosure, the spanner includes interior axle spanner and outer axle spanner, interior axle spanner with outer axle spanner passes through splined connection, interior axle spanner with axle connection in the spline, outer axle spanner with outer axle connection of spline, the axial length of the interior axle of spline is greater than the axial length of the outer axle of spline.

According to a specific implementation manner of the present disclosure, the tightening arm includes a tightening arm upper housing, a tightening arm lower housing, a gear transmission mechanism, a tightening sleeve, and an elastic ferrule;

screw up arm upper portion casing with screw up arm lower part casing lid closes in order to form the cavity in inside, gear drive, screw up the sleeve and elastic clamping sleeve set up in the cavity, screw up arm upper portion casing one end with the plate body is connected, gear drive's one end set up in be close to in the cavity the one end of plate body, gear drive's the other end is provided with screws up the sleeve, screw up telescopic one end with screw up arm upper portion casing fixed connection, screw up telescopic other end with elastic clamping sleeve connects.

According to a concrete implementation mode of the present disclosure, a counter bore is provided at one end of the tightening sleeve connected with the elastic clamping sleeve, the counter bore is used for placing a nut to be assembled, and the nut to be assembled is used for being screwed with the bolt to be assembled in a matching manner.

According to a concrete implementation mode of the present disclosure, the gear transmission mechanism includes a gear, a gear shaft and a bearing, the gear is disposed on the bearing, the gear and the bearing are mounted on the gear shaft, and the gear is connected to the plate body.

According to a specific implementation manner of the present disclosure, the tightening arm further includes a washer disposed at one end of the tightening sleeve close to the tightening arm upper housing, and the washer is used for fixing the tightening sleeve on the tightening arm upper housing.

According to a specific implementation manner of the present disclosure, a shaft sleeve groove is arranged on the support plate, and the spline sleeve is arranged in the shaft sleeve groove.

According to a specific implementation manner of the present disclosure, the adapter wrench further comprises a circular boss, wherein the circular boss is arranged below the support plate

By the scheme disclosed by the invention, aiming at the complex structure of the aero-engine air compression drum disc, the adapter wrench provided by the embodiment of the invention can be used for assembling the nut in the narrow operation space of the aero-engine air compression drum disc through the matching of the plate body and the tightening arm, so that the problem that the hand cannot reach the assembly position when a common wrench is used for construction is solved, and the connecting bolt between the whole aero-engine air compression drum discs is easy to assemble and disassemble.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram illustrating a usage state of an adapter wrench in an aero-engine air compressor drum disc according to an embodiment of the disclosure;

fig. 2 is a schematic diagram of a plate body structure of another adapter wrench according to an embodiment of the present disclosure;

fig. 3 is a schematic structural view of a tightening arm of another adapter wrench according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of another gear transmission mechanism of an adapter wrench according to an embodiment of the present disclosure.

Reference numerals:

1-a wrench body; 2-a spline shaft; 2 a-a splined inner shaft; 2 b-splined outer shaft; 3-a wrench; 3 a-inner shaft wrench, 3 b-outer shaft wrench; 4-spline housing; 4 a-spline shaft sleeve; 4 b-spline housing; 5-a support plate; 6-a hub; 7-tightening the arm; 8-a casing; 9-a gasket; 10-screwing the sleeve; 11-an elastic card sleeve; 12-a gear shaft; 13-a gear; 14-a bearing; 15-screws; 16-tightening the arm lower housing; 17-tightening the arm upper housing.

Detailed Description

The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.

In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

Referring to fig. 1, in the deep cavity of the air compressor drum disc of the aeroengine, a plurality of bolts to be assembled are arranged, the bolts to be assembled are arranged in a brake 8, and the positions of the bolts to be assembled are shown in fig. 1. The middle multi-stage blade disc is a deep-cavity part, the lower opening of the part is closed, the distance between the upper opening and the lower opening is 369.5mm, the distance between the position of a bolt to be assembled and the axis of the casing 8 is 188.72mm, when a common wrench is used for construction, a hand cannot reach the assembly position, the operation space is narrow, and the situation that a nut falls into a pressure drum disc and is difficult to take out easily occurs because the deep cavity of the pressure drum disc of the aircraft engine is invisible.

In view of the above, the inventor proposes a technical solution of the embodiment of the present invention through long-term thinking and continuous practice.

Examples

As shown in fig. 1, an embodiment of the invention provides an adapter wrench, which includes a plate body 1, a spline housing 4, a support plate 5 and a tightening arm 7, wherein the support plate 5 is used for being connected with an aircraft engine air compression drum disc, the spline housing 4 is arranged on the support plate 5, the plate body 1 is respectively connected with the spline housing 4 and the tightening arm 7, and the plate body 1 is used for driving the tightening arm 7 to rotate so as to tighten a bolt to be assembled on the aircraft engine air compression drum disc.

The support plate 5 can be supported at the upper opening of the aero-engine air compression drum disc, and in one implementation mode, the support plate 5 is provided with a fixed bolt opening which is matched with a bolt hole at the upper opening of the aero-engine air compression drum disc. In addition, a shaft sleeve groove is formed in the support plate 5, and the spline sleeve 4 is installed in the shaft sleeve groove. The lower part of the support plate 5 is provided with a circular boss for auxiliary support, and the circular boss is in contact with the hub 6 for auxiliary support, so that the support plate 5 is ensured not to shake and deform.

Spline housing 4 is laid in the axle sleeve groove, and spline housing 4 includes spline axle sleeve 4a and spline overcoat 4b, adopts ball bearing 14 to connect between spline axle sleeve 4a and the spline overcoat 4 b. A circular hole is formed in the spline outer sleeve 4b and matched with a threaded hole in the support plate 5.

As shown in fig. 2, the plate body 1 includes a spline shaft including an inner spline shaft 2a and an outer spline shaft 2b, and the inner spline shaft 2a and the outer spline shaft 2b are connected by a spline. The spline outer shaft 2b is used for twisting and can be detached, and comprises an inner shaft wrench 3a and an outer shaft wrench 3b, and the inner shaft wrench 3a and the outer shaft wrench 3b are connected through splines. The spline inner shaft 2a is connected with the inner shaft wrench 3a and is convenient to disassemble through clearance fit. The spline outer shaft 2b is connected with the outer shaft wrench 3b and is convenient to detach through clearance fit. The inner shaft wrench 3a and the outer shaft wrench 3b are respectively used for driving the spline inner shaft 2a and the spline outer shaft 2b to rotate, preferably, the upper part of the inner shaft wrench 3a is longer than the outer shaft wrench 3b so as to facilitate the connection of the inner shaft wrench 3a and the spline inner shaft 2 a. The spline shaft sleeve 4a is connected with the spline outer shaft 2 b. The spline inner shaft 2a is connected with a tightening arm 7, so that the wrench body 1 can drive the tightening arm 7 to extend into a deep cavity of an aero-engine air compression drum disc to assemble a nut for a bolt.

As shown in fig. 3, the tightening arm 7 includes a tightening arm upper housing 17, a tightening arm lower housing 16, a gear train, a tightening sleeve 10, and an elastic ferrule 11. One end of the tightening arm upper shell 17 is connected with the tightening arm lower shell 16 through a screw 15, a cavity is formed inside the tightening arm upper shell 17, and the other end of the tightening arm upper shell 17 is connected with the flower room outer shaft and used for driving the tightening arm 7 to rotate through the spline shaft. Preferably, the end surface of the upper housing 17 of the tightening arm is perpendicular to the axis of the spline shaft to ensure the correct connection of the nut and bolt to be assembled. The elastic clamping sleeve 11 is convenient for fixing the nut to be assembled.

The gear transmission mechanism, the tightening sleeve 10 and the elastic ferrule 11 are disposed in the cavity, as shown in fig. 3 and 4, the gear transmission mechanism includes a gear 13, a gear shaft 12 and a bearing 14, which are disposed in the cavity near one end of the plate body 1, and in one embodiment, the gear 13 is a set tooth type, and has 34 teeth, each rotation angle is 10.59 °, and is connected to the splined inner shaft 2a to rotate the gear 13, transmit torque to tighten the nut, and the estimated value of the torque transmission efficiency is at least 90%. The splined inner shaft 2a rotates about 21.18 ° and the gear 13 rotates 2 teeth. The other end of the gear 13 is provided with a tightening sleeve 10, one end of the tightening sleeve 10 is fixedly connected with the tightening arm upper shell 17, and the other end of the tightening sleeve 10 is connected with the elastic clamping sleeve 11. Preferably, a counter bore is formed in one end, connected with the elastic clamping sleeve 11, of the tightening sleeve 10, the counter bore is used for placing a nut to be assembled, and preferably, the size of the counter bore is consistent with that of the nut to be assembled.

In another embodiment, the end of the tightening arm 7 remote from the plate body 1 is provided with a recess for the connection of a tightening sleeve 10, and a washer 9 is arranged in the recess for fixing the tightening sleeve 10 to the upper housing of the tightening arm 7.

Compared with the prior art, the switching wrench provided by the invention has a simple structure, is easy to operate in an air compressor drum disc of an aero-engine, can flexibly extend into a deep cavity of the air compressor drum disc of the aero-engine to screw a nut to be assembled, and comprises the following specific operation steps in the air compressor drum disc of the aero-engine according to the embodiment of the invention:

step 1: the nut to be assembled is placed at the countersunk position in the tightening sleeve 10 of the tightening arm 7 and is fixed by the elastic clamping sleeve 11, so that the problem that the nut falls into the blisk and is difficult to take out in a complex environment is solved.

Step 2: the support plate 5 is fixed at the bolt hole of the casing 8 and screwed, the boss is used for assisting in supporting the hub 6, and the position is adjusted, so that the axis of the shaft sleeve groove of the support plate 5 is parallel to the axis of the casing 8.

And step 3: tightening the anchor bolts of the plate 5 ensures that the plate 5 does not wobble during the following steps.

And 4, step 4: the outer shaft wrench 3b is slipped over the splined outer shaft 2b and the tightening arm 7 is rotated to align the tightening socket 10 with the bolt to be assembled.

And 5: the nut to be assembled is sleeved on the bolt to be assembled, and then the nut to be assembled is screwed by the inner shaft wrench 3 a.

Step 6: the tightening sleeve 10 is withdrawn and the tightening arm 7 is rotated back to the centre of the casing 8 by turning the tightening arm 7 with the outer shaft wrench 3 b.

And 7: the support plate 5 is detached and the support plate 5 is rotated to the next bolt to be assembled.

And 8: and (4) repeating the operations from the step 1 to the step 7 until all the bolts to be assembled are screwed.

And step 9: and (5) detaching the whole adapter wrench.

The embodiment provided by the invention can be used for assembling the nut in a narrow operation space aiming at the complex structure of the aeroengine air drum disc, solves the problem that a hand cannot reach an assembly position when a common wrench is used for construction, enables a connecting bolt between the aeroengine air drum disc and the aeroengine air drum disc to be easily assembled and disassembled, and realizes that:

the simple operation structure reduces the complexity of operation, facilitates convenient and simple assembly and disassembly, reduces the assembly time, improves the assembly efficiency, reduces the equipment manufacturing cost and improves the economic benefit;

through the gear transmission mechanism, the complexity of the mechanism is reduced, the assembly process is simplified, and the transmission efficiency of torque is effectively ensured;

in the process of clamping the to-be-assembled nut, the to-be-assembled nut is fixed in the screwing sleeve 10 at the front end of the screwing arm 7 through the elastic clamping sleeve 11, the phenomenon that the to-be-assembled nut easily drops is avoided, meanwhile, the phenomenon that the to-be-assembled nut possibly rotates to cause installation problems in the to-be-assembled nut is fixed by other elastic devices through magnetic adsorption is avoided, and the assembling efficiency is greatly improved.

The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. The adapter wrench is characterized by being applied to an aero-engine, wherein the aero-engine comprises an air compressor drum disc, the air compressor drum disc is provided with a deep cavity, and a bolt is to be assembled in the deep cavity;

the adapter wrench comprises: the support plate is used for being connected with the aero-engine air drum pressing drum disc, the spline sleeve is arranged on the support plate, the plate body is respectively connected with the spline sleeve and the tightening arm, the plate body is used for driving the tightening arm to rotate, and the switching wrench is used for penetrating into the deep cavity to tighten bolts to be assembled on the aero-engine air drum pressing drum disc.

2. An adapter wrench according to claim 1, wherein the plate body comprises a spline shaft and wrench (3) which are respectively connected with the wrench (3) and the spline housing, and the wrench (3) is used for driving the spline shaft to rotate.

3. The transfer wrench of claim 2, wherein the spline shaft includes an inner spline shaft and an outer spline shaft, the inner spline shaft is splined to the outer spline shaft, the inner spline shaft is connected to the wrench, and the outer spline shaft is connected to the spline housing.

4. An adapter wrench according to claim 3, wherein the wrench (3) comprises an inner shaft wrench and an outer shaft wrench, the inner shaft wrench being splined to the outer shaft wrench, the inner shaft wrench being connected to the inner splined shaft, the outer shaft wrench being connected to the outer splined shaft, the inner splined shaft having an axial length greater than the outer splined shaft.

5. The transfer wrench of any one of claims 1-4, wherein the tightening arm includes a tightening arm upper housing, a tightening arm lower housing, a gear train, a tightening sleeve, and a resilient collar;

6. The transfer wrench as claimed in claim 5, wherein a counter bore is formed in one end of the tightening sleeve connected with the elastic clamping sleeve, the counter bore is used for placing a nut to be assembled, and the nut to be assembled is used for being screwed with the bolt to be assembled in a matched manner.

7. The impact wrench of claim 5, wherein the gear transmission mechanism comprises a gear, a gear shaft, and a bearing, the gear is disposed on the bearing, the gear and the bearing are mounted on the gear shaft, and the gear is connected to the plate.

8. The transfer wrench of claim 5, wherein the tightening arm further comprises a washer disposed at an end of the tightening sleeve proximate the tightening arm upper housing, the washer configured to secure the tightening sleeve to the tightening arm upper housing.

9. The transition wrench of claim 1, wherein the fulcrum plate is provided with a sleeve slot, and the spline housing is disposed within the sleeve slot.

10. The transition wrench of claim 1, further comprising a circular boss disposed below the fulcrum plate.